All names: 2MASS J20521684-2206336, WD 2049-222, WDJ205216.84-220633.42, EC 20493-2217, Gaia DR3 6808651507904773888, BPS CS 22880-0126, CNS5 5158, NLTT 50029, GALEX J205216.8-220632, TIC 77062643, J2052-2206, Gaia DR2 6808651507904773888, LP 872-48, Gaia EDR3 6808651507904773888
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | Gaia DR2 | Stilism | Kawka et Vennes 2006 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 52 16.85 (0.03) | 20 52 16.85 (0.04) | 20 52 16.85 | 20 52 16.84 (0.03) | 20 52 16.85 | 20 52 15.82 | ||||||
| Declination | -22 06 31.10 (0.01) | -22 06 31.17 (0.02) | -22 06 31.10 | -22 06 33.42 (0.01) | -22 06 31.17 | -22 06 28.08 | ||||||
| Spectral type | DCP | DC | DC | DC | DC | DC | ||||||
| Effective temperature | [K] | 7811.0 (60) | 7665.0 (27) | 9300.0 (1000) | 7667.0 (30) | |||||||
| log(g) | [cgs] | 8.19 (0.02) | 8.14 (0.005) | 8.00 | 8.16 (0.006) | |||||||
| Mass | [M☉] | 0.693 (0.01) | 0.664 (0.004) | 0.58 | 0.675 (0.006) | |||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 1.5700 | ||||||||||
| log(H/He) | -3.6 | |||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| log(N/He) | ||||||||||||
| log(O/He) | ||||||||||||
| log(Na/He) | ||||||||||||
| log(Mg/He) | ||||||||||||
| log(Al/He) | ||||||||||||
| log(Si/He) | ||||||||||||
| log(P/He) | ||||||||||||
| log(S/He) | ||||||||||||
| log(Cl/He) | ||||||||||||
| log(Sc/He) | ||||||||||||
| log(Ti/He) | ||||||||||||
| log(V/He) | ||||||||||||
| log(Cr/He) | ||||||||||||
| log(Mn/He) | ||||||||||||
| log(Fe/He) | ||||||||||||
| log(Co/He) | ||||||||||||
| log(Ni/He) | ||||||||||||
| log(Cu/He) | ||||||||||||
| log(Zn/He) | ||||||||||||
| log(Ga/He) | ||||||||||||
| log(Ge/He) | ||||||||||||
| log(Sr/He) | ||||||||||||
| Parallax | [mas] | 49.21 (0.03) | 49.21 (0.03) | 49.22 (0.05) | 49.22 (0.05) | 49.21 | 49.21 (0.03) | 49.22 (0.05) | ||||
| Distance | [pc] | 20.32 (0.01) | 20.32 (0.01) | 20.32 (0.02) | 20.32 (0.02) | 28.00 | 20.32 | 20.32 (0.01) | 20.32 (0.02) | |||
| Composition | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 4.188045099 (0.03) | 4.199437031 (0.07) | 4.188 (0.03) | 4.199437031 | |||||||
| Proper motion (declination) | [mas/yr] | 145.1479788 (0.03) | 145.2257521 (0.05) | 145.148 (0.03) | 145.2257521 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 15.17 | |||||||||||
| V magnitude | 15.00 | |||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 14.57 (0.04) | 14.57 (0.04) | ||||||||||
| H magnitude | 14.60 (0.06) | 14.60 (0.06) | ||||||||||
| K magnitude | 14.57 (0.07) | 14.57 (0.07) | ||||||||||
| u magnitude | ||||||||||||
| g magnitude | ||||||||||||
| r magnitude | ||||||||||||
| i magnitude | ||||||||||||
| z magnitude | ||||||||||||
| G magnitude | 14.94 (0.001) | 14.95 | 14.94 | 14.94 (0.003) | 14.95 | |||||||
| BP magnitude | 15.04 (0.001) | 15.04 | 15.04 | |||||||||
| RP magnitude | 14.72 (0.001) | 14.72 | 14.72 | |||||||||
| Pan g magnitude | 15.07 (0.004) | 15.07 (0.004) | ||||||||||
| Pan r magnitude | 15.00 (0.002) | 15.00 (0.002) | ||||||||||
| Pan i magnitude | 15.06 (0.002) | 15.06 (0.002) | ||||||||||
| Pan z magnitude | 15.15 (0.001) | 15.15 (0.001) | ||||||||||
| Pan y magnitude | 15.25 (0.003) | 15.25 (0.003) | ||||||||||
| E(B-V) | 0.001 | |||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.